const electron = require('electron');
// Module to control application life.
const app = electron.app
const Menu = electron.Menu;
// Module to create native browser window.
const BrowserWindow = electron.BrowserWindow;
const globalShortcut = electron.globalShortcut;

const path = require('path');
const url = require('url');

// Keep a global reference of the window object, if you don't, the window will
// be closed automatically when the JavaScript object is garbage collected.
let mainWindow

function createWindow() {
    // Create the browser window.
    mainWindow = new BrowserWindow({ width: 800, height: 600 })

    // and load the index.html of the app.

    mainWindow.loadURL(url.format({
        pathname: path.join(__dirname, './index.html'),
        protocol: 'file:',
        slashes: true
    }))

    // Open the DevTools.

    const dirname = __dirname;
    // Emitted when the window is closed.
    mainWindow.on('closed', function() {
        // Dereference the window object, usually you would store windows
        // in an array if your app supports multi windows, this is the time
        // when you should delete the corresponding element.
        mainWindow = null
    })
}

function createMenu() {

    const template = [{
        label: '操作',
        submenu: [{
                label: '打印',
                click: function() {
                    let win = BrowserWindow.getFocusedWindow();
                    win.webContents.print();
                }
            }

        ]
    }];
    const menu = Menu.buildFromTemplate(template);
    Menu.setApplicationMenu(menu);
    globalShortcut.register('F6', () => {
        mainWindow.webContents.toggleDevTools();
    });
    globalShortcut.register('F5', () => {
        mainWindow.webContents.reloadIgnoringCache();
    });

}
// This method will be called when Electron has finished
// initialization and is ready to create browser windows.
// Some APIs can only be used after this event occurs.
app.on('ready', () => {
    createWindow();
    createMenu();
})

// Quit when all windows are closed.
app.on('window-all-closed', function() {
    // On OS X it is common for applications and their menu bar
    // to stay active until the user quits explicitly with Cmd + Q
    if (process.platform !== 'darwin') {
        app.quit()
    }
})

app.on('activate', function() {
    // On OS X it's common to re-create a window in the app when the
    // dock icon is clicked and there are no other windows open.
    if (mainWindow === null) {
        createWindow()

    }
})

// In this file you can include the rest of your app's specific main process
// code. You can also put them in separate files and require them here.